View clinical trials related to Pharmacokinetics.
Filter by:This study is being done to determine the systemic absorption of nasally inhaled acetaminophen (Tylenol®) versus orally ingested acetaminophen by comparing the serum drug concentrations of the two groups obtained at various times after study drug administration.
The purpose of this study is to determine how well tolerated and safe AZD8566 is when given over 10 days, at different dose levels. This study will also determine how AZD8566 is distributed around the body and how it leaves the body.
Intravenous (IV) morphine requirement for immediate postoperative pain control depends upon the complex interplay of patient history, wound severity, environment, and genetics. Even for relatively uniform stimulus intensity, such as that associated with tonsillectomy and adenoidectomy (T&A), there can be marked individual variability in response to morphine. Some patients are refractory to standard doses and need increased amounts. Others are sensitive, require less drug to attain acceptable pain levels, and/or experience unwanted side effects that limit dosing. A significant number must be switched to different analgesics altogether. Despite the long clinical history of morphine as a postoperative analgesic, researchers have only begun to examine the origins of response variability. The investigators will look at 2000 retrospective Tonsillectomy and Adenoidectomy (T&A) cases and using this data and incorporating additional patient, surgical, and environmental factors that may contribute to response variability, the investigators then propose a prospective genome-wide association (GWA) study of 1500 children ages 4 to 18 years treated with IV morphine sulfate for day surgery T&A.
The purpose of this study was to compare the pharmacokinetic profiles at steady-state of the test product, Tramadol HCl Once-A-Day (OAD) 200 mg tablets and the reference product, Tramadol HCl 50 mg (IR) tablets (Ortho-McNeil Ultram®). For this purpose, the extent of absorption of tramadol and formation of O-desmethyltramadol (measures of systemic exposure) after multiple administration of 50 mg 6-hourly at 07:30, 13:30, 19:30 and 01:30 (reference product) and 200 mg 24-hourly at 07:30 (test product), were compared.
The purpose of this study is to evaluate the relative drug concentrations achieved with different formulations of GSK1838262 in healthy volunteers.
TMC125 is from the class of drugs called non-nucleoside reverse transcriptase inhibitors (NNRTIs). NNRTIs work by blocking reverse transcriptase, a protein that HIV needs to make more copies of itself. TMC125 is used in the treatment of adults with HIV-1 infection. The purpose of this trial is to see if there is any potential interaction (change in the effectiveness of the drug) when taking multiple-dose TMC125 and buprenorphine/naloxone together. The trial will also assess the short-term safety and tolerability (how well your body handles the drug) when TMC125 and buprenorphine/naloxone are taken together.
The purpose of this study is to evaluate how much and how fast a single, oral, daily 25 mg dose of TMC278 is absorbed into the body when administered as a solution, suspension, granules, or a tablet. In addition, the effect of each formulation of TMC278 will be evaluated in patients in the fasted and fed states and the palatability (how the drug tastes) of each formulation will be assessed. Finally, the safety and tolerability of each formulation of TMC278 will be assessed throughout the study.
To estimate the pharmacokinetics of single doses of benzodiazepines in Mexican adult healthy volunteers: a) alprazolam tablet extended release, b) alprazolam tablet immediate release, and clonazepam tablet.
The purpose of this study is to evaluate the effects of a chronic co-medication of efavirenz on pharmacokinetics and sterol-lowering effects of ezetimibe at steady-state in healthy subjects genotyped for ABCB1, ABCC2, CYP2B6 and UGT1A1.
The aim of the investigators research is to see if variants in a particular gene (named CYP2B6) affect how the body metabolizes (breaks down) certain medications, including the drug bupropion. Bupropion is widely used in the treatment of depression and for helping people quit smoking. Genes are portions of DNA that code for particular proteins in the body. The investigators are studying the gene that codes for a protein called CYP2B6. Differences in the structure of the gene are called variants and may mean that a person metabolizes a drug faster or slower than a person with a different variant.